Giacomo beedee



(No Model.) G. BREDEE.

ALARM LOOK. No. 326,840. Patented Sept. 22, 1885.

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WITNESSES: INV-BNTOR awmdjm BY my ATTORNEYS NITED STATES GIACOMO BREDEE, OF NEW YORK, N. Y.

ALARM-LOCK.

SPECIFICA TION forming part of Letters Patent 110,326,840, dated September 22,1835.

Application filed April 16, 1885.

To aZZ whom it may concern.-

Be it known that I, GIACOMO BREDEE, a citizen of the United States, residing at New York, in the county and State of New York, have invented new and useful Improvements in Alarm-Locks, of which the following is a specification.

My invention relates to improvements in locks; and it consists in the combination, with a bolt, of a spring-pressed latch'cam pivoted to the bolt, a bent lever, one arm of which is engaged by the latclrcam, a hammer attached to the other arm, a spring acting on the lever, and means for actuating the bolt, all of which is more fully pointed out in the following specification and claims, and illustrated in the accompanying drawings, in which Figure 1 is a Iront view of the lock with the lock-plate removed, showing the bolt in its normal position. Fig. 2 is a transverse section of the same in the plane w at, Fig. 1. Fig. 3 is a front view showing the bolt partially thrown back. Fig. 4 is an inverted plan view of the bolt.

Similar letters indicate corresponding parts.

In the drawings, the letter A designates the lock-case. B is the bolt, 0 the hub, and D the bolt-lever, all of ordinary construction, the bolt B being constantly forced outward, as shown in Fig. 1, by a spring, E, acting on the lever D, to which said bolt is pivoted at a.

G is the gong, supported on a stud, b, or otherwise secured to the loclccase, and which is adapted to be sounded by the hammer H, attached by means of a spring-arm, c, to one arm, d, of the bent lever F, which is pivoted at its elbow to the lock-case. The other arm, 6, of this lever F projects in a position to be engaged when the latch -bolt is thrown in ward by a latch-cam, I, which is pivoted to the under side of the bolt at f, Fig. 4, and is subjected to the action of a spring, J, secured at one end to the latch, the tendency of the spring being to keep the latch-cam constantly pressed against a post, on the bolt, so that the same cannot yield when it engages the lever F on being thrown inward. The bent lever is subjected to the action of a spring, K, which is secured to a post, 9, in the case, and

(No model.)

the hammer H is held out of contact with the gong by a stop, h, against which the spring arm 6 abuts.

In the operation of the look, when the bolt is thrown inward, one end of the latch-cam engages the arm 0 of the bent lever F, and the hammer H is thrown backward, as shown in Fig. 2, in which figure the bolt is at such a point that any further motion inward of the bolt will cause the cam I to release the arm 6 of the lever F, and the hammer sounds the gong, its spring-arm first striking the stop it, and the remainder of the motion of the hammer being allowed by the elasticity of the sprlng-arm.

When the bolt returns to its looking or normal position, the opposite end of the latchcam I is at first engaged by the arm 6 of the lever F, whereby the cam is turned about its pivot f against the force of the spring J, so as to clear the said lever F.

In the example shown in the drawings my alarm mechanism is attached to thelatch-bolt of a look; but the same may be applied in precisely the same manner to a lock-bolt or to any other bolt.

Instead of placing the gong in the interior of the lock-case, it may be secured to the outside of the latter, which may be done without departing from the spirit of my invention. I deem this latter arrangement preferable to the former when a loud sound is required, because the sound emanating from the gong is not muifled by the look-case.

In case it is desired that the gong shall not be sounded whenever the bolt is drawn back to its unlocking position, I make use of some such means as a sliding piece,which can be caused to pass between the latch-cam and the lever F, whereby the former is pre vented from engaging the said lever; but any other well-known mechanism can be employed to accomplish this purpose.

WVhat I claim as new, and desire to secure by Letters Patent, is

1. In a lock, the combination,with the bolt, of the spring-pressed latch-cam I, pivoted to the bolt, the bent lever F, one arm of which is engaged by the latch-cam, the hammer attached to the other arm, the spring K, acting In testimony whereof Ihave hereunto set my on said lever, and the gong G, substantially hand and seal in the presence of two subscribas shown and described. ing witnesses.

2. In a lock, the combination,with the bolt, 5 of the spring-pressed latch-cam I, pivoted to GIACOMO BREDEE. [L s.]

the bolt, the bent lever F, one arm of which I is engaged by the latch-cam, the hammer at- Witnesses: tached to the other arm, the stop h, the spring W. HAUFF, K, acting on saidlever, and the gong, substan- A. FABER DU FAUR, Jr.

10 tially as shown and described. 

